/*-
 * #%L
 * HAPI FHIR JPA Model
 * %%
 * Copyright (C) 2014 - 2025 Smile CDR, Inc.
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package ca.uhn.fhir.jpa.model.util;

import ca.uhn.fhir.jpa.model.entity.ResourceLink;

import static org.apache.commons.lang3.StringUtils.isBlank;

public class ResourceLinkUtils {

	/**
	 * UNKNOWN resource type, used for flagging
	 * canonical urls in ResourceLinks.
	 */
	public static final String UNKNOWN = "(unknown)";

	/**
	 * Returns true if the target of the resourcelink is a canonical url;
	 * returns false otherwise.
	 */
	public static boolean isTargetCanonicalUrl(ResourceLink theLink) {
		return isBlank(theLink.getTargetResourceId())
				&& theLink.getTargetResourceType().equals(UNKNOWN);
	}
}
